But just where in the UK is the gender pay gap most prevalent? Looking at data from the Annual Survey of Hours and Earnings, released by the Office of National Statistics, the City of London is home to the biggest gap is in terms of pounds earned - the median salary for men is £21,070 above the median salary for women. Otherwise put, women earn just 66.6 per cent of what men earn.

That may be because women working in finance and insurance are the biggest losers, earning up to 40 per cent less than men, depending on their role.

However, the biggest pay gap in terms of percentage is in Ribble Valley, Lancashire, where women earn just 49.7 per cent of what men earn.

In fact, there are just eight local authorities in the UK where women earn more than men.

And while more women are now going on to university, this is not translating in to leadership positions, with women only now earning the amount men did in 2006, and progress to close the pay gap all but stagnating.